Mining machine



May 5, 1925. l 53%4?? F. CARTLIDGE y M MINING MACHINE Original Filnjd June l2, 1915 3 snee-s shegf, l

May 5, 925. I 1,536,422

y F. CARTLIDGE MINING MACHINE Original Filed` June l2, 1915 3 Sheetsf-Sheet 2 /j Imm/fi Mzy 1925 1,536,422

v l F. CARTLIDGE MINING 'MACHINE Original Filed June l2, 1915 3 Sheets-Sheet 5 A (fo/maw Patented May 5, l925.

curr-izo STATES PATENT orifice.-

FRANK CARTLIDGE, or TERREHAUTE. INDIANA, Assioma 'ro sULLrvAN'nfA- CHINERY COMPANY, A conroaa'rron or MASSACHUSETTS.

MINING MACHINE.

Application fle'd J'uue 12, 1915, Serial No. 33,650. .Renewed July 26, 1321. .Serial No. 487,724.

To all whom may concern.' Q

Be it known that l, FRANK CARTLIDGE, a citizen of the United States, residing at Terre Haute, in the county of Vigo zand' State of Indiana, have invented a new and useful Mining Machine, of which the fol lowing is a specification.

This invention relates to mining machines, and more particularly' to mining machines `of the type comprising kerf Cutting Imechanism and adapted` to vbe propelled and guided relative to a mine bottom by flexible feeding and guiding mechanism including l flexible-f feeding and guiding portions and means cooperating therewith to.determine the movements of the machine.

An object of the invention is to provide an improved mining machine. Another'object is to rovide an improved mining Inachine having improved feeding means. A further object ofthe invention is to provide an improved mining machine having improved feeding means by which feeding may be accomplished at predetermined cutting and higher speeds. A still further obproved mining machine in which a single driving'motor cooperates with improved cutting mechanism actuating and feed op# erating mechanism to effect cutting and anv improved control of the machine during cutting and also during'moving over a mine bottom at othertimes and in which the parts are exceedinglyy compactly arranged.. Another object of the invention is to provide an improvedk'feeding mechanism wherein an improved control is secired and in which more particularly the f edingis automatically controlled by the load due to the re.

sistance to cutting whereby the speed of the feeding is dependent upon and preferably varies in inverse sense to thc load on `the cutter. It is a still further object of the invention to secure this automatic control electi-ically and by mechanism which requires but a small. amount of force for its feed controlling operation thereof though con? trolling a heavy machine, which is arranged in such'a compact manner that it can he. used inV the very` narrow space ywhich is usually.l available for mining operations,Vv

which is self-oiling", and'in which the driv 'ingjmotor, wlienran 4electric motor, can be either a direct or an alternating current motor, without any possibility that the alternatingA current motor will be stalled. Further objects and advantages of the invention will hereinafter appear. i

In the accompanying drawings I have shown for purposes of illustration two forms which my invention may assume in prac-` tice. p In these drawings,-

Fig. 1 is a plan view of the machine employing the .preferred form of my invention, with the cutter partly broken away; Fig. 2 is a side elevation of such mining machine,

.with some ofthe parts in section to show the driving mechanism; Fig. 3 isa partial section on the line 3-3 of Fig. l; Fig. 4: is a view showing the gear connections for the feeding mechanism; Fig. 5 is a section on l the line 5 5 of Fig. V1; Fig.v 6 isla frag mentary view showinga modified form of my invention; Fig.'7 is al section on the line 7-7 ofFig. 6; Fig.'8 is a diagrammatic view showingthe electrical connections when the driving motor is an electric motor of the 'commutator type; and Fig. 9 is a similar diagrammatic view, showingthe connections `when the driving motor is an alternating.

current motor of the squirrel cage type.

The main frame 10 of the machine has a substantially flat bottom and carries all the working parts. The power for driving and feeding is furnished by a single electric mo-` tor 11, which rests on a horizontal shelf` 12 of the main frame 10, such shelf being spaced some distance above the bottom of the frame to provide a space for the cutter chain as hereinafter apparent. On the shaft of the motor 11 is a bevel pinion 13, which meshes with a bevel gear 14 having an elongated hub 15 which is keyed to zii-vertical shaft 16 which is hung from its upper end on `an adjustable thrust bearing 17 supported in a removable cap plate 18 and located in a pocketformed by an 11p-standing flange 19 surrounded by a. cap 20, which may be removed to `fill such pocket with oil or other 'asi iool lubricant. The capii-plate `18 also has a downwardly extendin'gviiange 21, which sur- Y roundsthe hub '15""anfd .between which and such hub 15 is a bushing 22',.ivhichiz.islkpt filled with oil by an up-standiugfl'angeiQ carried by the gear '1 4 and,surroun'dingA but los spaced from the flange 21. pocket formed by the flange .19 passes down along the bearing surfaces of the bushing 22, andin order to escape must overiiow the flange 23. vThe shaft 16 is further supported by a bushing 24 in the floor ot lthe casing 25, which bushing rises a considerable distance above such floor so as te maintain such gear casing partly full of oil, and by a bushing 26 mounted in an 11p-standing llange 27 from the bot-tom of the :main frame 10, the bushing 26 being closed at the bottom to enclose the lower end of the shaft 16. The bearing surfaces ot' the bushing 26 are-lubricated by the oil which overflows from the gear casing 25 through the bushing 24, and also by an overiiow pipe which opens into such gear casing at about the level of the top of the bushing 24 and leads downward through the floor of auch gear casing to communicate with the bushing 26.

F or further lubrication of the driving pinion i3, an oiling idler 29 ymay be mounted on the main frame l to mesh with such pinion and to dip into the oil in the gear casing 25.

Below the floor of the gear casing but above the upper end oi' the bushing 26 a pinion 30 is fixed on the shaft 16. This pinion meshes with a gear 31 mounted on a shaft 32, which has bearings in bushings mounted in. an Lip-standing circular flange 33 from the bottoni of 'the main trame 10 and in an Lip-standing iiange 34 from the lio-or of the gear casing'lti, the tlange 34 being locatedP 'between some el the parts hereinafter described and overlapping therewith 'for economy .in space. As shown the lower end of the shaft 32 is also lubricated from the casing 25, a suitable. passage 32 in the. bottom of the main frame supplying lubricant thereto from the bushing 26 which, as shown, has a suitable port. 26 communicating with said passage.: The gear 31 carries a driving sprocket 35, fora cutter chain 36, which is mounted on such sprocket 35 and travels around a sl'xitable projecting frame 37 which extends into the vein of coal to be cut, the frame 37 being supported and the chain 36 being located in the space between the shelf 12nnd the bottom ot' the main frame 10. The cutter chain 36 has the usual `cutters 38. Thus the motor l1 drives the cutter chain 36 through the pinion 13, gear 14, shaft 16, pinion 30, gear 3l, and sprocket 35.

A worm 40 is fixed on the shaft 16 between the floor of the gear casing 25 and the gear 14. The lower end of this worm projects loosely over the upper end ot' the bushing 24. The verni 46 meshes with a worm gear mounted on a horizontal stub or jack shaft 42. From this shalt 42 the feeding mechanism is driven.

vln that form of my invention which shall specifically prosecute herein and whichl The oil Jfrom the is shown in Figs. 1 to 5 inclusive, the shaft 42 has fixed theteon two duplicate pinions which mesh respectively with two duplicate gears 44 mounted on sleeves 45 and 46 respectively, which sleeves are co-axial with and rotatable relatively to a horizontal shatt 47, the sleeve 45 fitting directly on a bushing on the shaft 47. The two gears 44 are spaced apart, but are connected to rotate together by bolts 48, on each of which bolts are mounted two planet gears 49 and 5() of slightly dilierent size but rigid with cach other so as to rotate together. The gears 49 are shown as slightly larger than the gears 's 49 mesh. with a sun 50. The planet g.. gear 51, and the plait gears 50 with a sun gear 52, the sun gear if l1 `:ing larger than the sun gear 51 to corres-p. ad with the dif- :terence in size of the planet gears 49 and 50. The reason for having the pinions 43 and gears 44 duplicated is merely to eliminate all tendency to twist in the planet gears 49 and 50 and the sun gears 51 and 52. The sun gear 52 is fast on the shaft 47. The sun gear 51 forms part ot a sleeve 53 rotatably mounted on said shaft and located. betweensuch shaft and thesleeve 46. A sliding sleeve 54 has sliding toothed connection with the sleeve 53, and is slidable in either direction along such sleeve by a nger 55 which may be operated by a shift lever '56. The sleeve 54 is provided `with teeth on both axial ends, so that when slid in one direction from neutral position, in which it is free from any locking engagement, the teeth 57 on one end engage teeth 58 on the end of the sleeve 46, to lock together the sleeves 46 and 53 and thus cause the sun and planet mechanism to revolve as a unit; and When slid in the other direction from'neutral position, the teeth 59 on the other end engage teeth 60 on a worm wheel 61, loose on the shaft 47, to lock together said Worm wheel 61 and the sleeve .53. The worm Wheel 61 meshes with a worm 62, the pitch of which is such that it can be driven, though with small force, by the worm Wheel 61. The Worm 62 is mounted in thrust bearings 63, and is provided at one end with a bevel gear 64 which meshes with a bevel pinion 65 on a vertical shaft 66. A clutch or brake casing 67 is loosely mounted on the shaft 66 near its upper end, and isv provided with a surrounding brake band 63 rwhich may be set toany desired tightucss by a thumb screw 69 passing through its cars 70. The ears 70 are located in a lateral pocket 71 of the gear casing 25, the walls of which pocket restrain the ears 70 and prevent 'the brake band 68 from turning. Thus by sotting or releasing the thumb sci-cw 69,' which can be done With very small force, the brake casing 67 may be held stationary or released at will. Between the brake casing .67 and a collar 72 carried by the shaft 66 is located '/130 message a multiple disk clutch or brake 73, which is set and released by axial movements ofthe brake casing 67. The brake casing 67' rests -onan annulus 74 surrounding the. sha'lt 66 and vspring-pressed upward by a compression spring 75 located between such annulus and a thrust bearing 76, so that the annulus 74 and spring 75 vmay rotate with the shaft 66 if necessary. The spring 7 5 sets the clutch 73. url heannulus 74 is provided with a peripheral flange 77, which. may be engaged I by a pair ot rollers 78 mounted on a forkedV lever 79. rlhis lever 79 straddles the annulus 74, is pivotally mounted at its forked end on a pair of fixed pivot pins 89, suitably supported from thetrame, and at the other is pivotally connected to the upper end ot a vertically movable core 81 ot solenoid 82. rlhe rollers 78 are quite close to the pivot pins 80, and are normally held clear of theY flange 77 byA a compression spring 83 which bearsv upward against the under end of an adjusting screw 84 carried by the lever 79 near the core 81.

The solenoid 82 is connected in series with the motor 11 across any suitable supply circuit 85, through any suitable switch 86 and controlling device 87. rll`he mot/or 1l is shown in Fig. 8 as a compound wound mo tor ot the-'commutator type, and in Fig. 9 as anl induction motor of the squirrel cage type. Because of the series connection of the' solenoid 82, the pull of such solenoid1 varies directly as the load on the motor 1l, which load is in the main that due -tothecuttlng mechanism. If desired, aswlitch 88 may be Aprovided for short-circuiting the solenoid 82. V rl`he leed control mechanism justdescribed is :tor controllingI the speed et the shaft 47, `which overhangs at one end and is there providedwith a gear 99, which meshes with an internal gear 91 on a feed operating member herein in the form of a winding drum 92, for driving the latter. This winding drum may have wound on itl arope or cable, which entends trom it and over any desired caes ot` .the pulleys 93, to move the whole mining machine in the desired direction vas `fthe rope or cable is wound up onthe drum 9:2,a second rope or cable being provided on andebntrolled `by a friction controlled take .npdffum 94 so that after the cutter bar vhas "been sumped into 'a mine lace, the machine may be moved bodily laterally" along the tace to. under out the saineffin a.v well known- `project"downsinto the hollow upper face` of the gearl, which is'shaped to receive them, so that the total height ot the machine may be as small possible.. The gear 'casing 25 is likewise curved below the gears 44, 49, and 50, and 61 and G2 to project downward into the hollow upper tace of the gear 31, and toprovide an oil-tight casing for the gears hist-named, so that in operation they may 5,.th'is travel of the `planet gears 49 and 5()A is without eiiecton the shaft 47 and pro- (luces no feeding operation, because the gear 51, which maybe called the reaction gear, is .tree to rotate, 'and so there can be no reaction against it to cause a movement of the sha'ft47, which is subject to the resistance olered to the feeding 'ol' the machine. it

4a quick feeding is desired,A as for moving 'the machine from place to place or setting it, the shift lever 56 is thrown to cause intermeshing ot. the teeth 57 and 58, thus locking the sleeves 46 and ,58 together and causing the sun and the planet mechanism to revolve as a unit and the shalt 47 to rotate at the ,same speed as the gears 44. It a slow feed-` ing is desired, the shift lever 56 is thrown to vcause intermeshing oiE the teeth 59 and 60,

whereupon the travel ot 'the planet gears 49 and 50 tends te produce movements et the sun gears 51 and 52 in opposite directions, vthe sun gear 52 tends to drive the winding drum 92, through the shaft 47 and gears 90 and 9i, and the' sun gear 51, which is the reaction gearntends to drive the shaft 66, through the intermeshing teeth-59 and 60, the worm wheel 61, the worin 552, and the bevel gears G4 and G5. 'lhis tendency to drive the gears 51 and 52 in opposite directions niay be cont-rolled by hand by the thumb screw G9. llt such thumb screw is loosened, the brake casing 67 may rotate freely, thus allowing` the,.reaction gear 51 to rotate and preventing it from furnishing the reaction-necessary to cause movement of the sun gear 52 and winding drum 92. Bytightening the thumb screw 69, any de sired amount oft resistancef may be oi'lz'ered to the rotation Lofthe brake casing 87, or

movement, thus retarding or stopping the 'such brake casing may Ibe loe/lied',uigainst/` movement of the reaction gear .51 and prof viding the necessary resistance Jfor 'the sun gear 52. to react against in order for it to rotate to turn the windingdrum 92. Thus by adjusting the thumb screw 69 the feeding of the machine may be controlled byhand.

- This Yhand control, however, can not-fproe duce more than a given load on the motor l1; for as the thumb screw 69 is tightened and the brake casing 67 is retarded or stopped in its rotation, the forward feeding of the machine may impose a load on the cutting chain 3G, and therefore on the lnotor 11, and this load causes a larger current to be drawn by the motor 1l. This larger current causes the solenoid 82 to exert a greater pull on its core 81, and when the current is sufficiently great the solenoid draws down the core 81`against the action of the spring 83. The spring S3 may be adjusted by the screw 84 to cause the solenoid to act to any desired current. As the core 8'1 is drawn down, the rollers 7 8 approach and finally engage the flange 77, and if the currentdrawn by the motor 11 still increases the continued downward movement ofthe core 8l because of such increased current causes the rollers 7 8 by their action on the flange 77 to depress the annulus 74 and to release the clutch or brake 73 to a greater or less extent, thus permitting the shaft 66 to rotate n'lore or less freely even though the brake casing G7 is retarded or held stationary. This releasing of the clutch V73 and the resultant rotation of the shaft GG permits the reaction gear 51 to rotate and thus removes the resistance against which the sun gear 52 must react in order to produce rotation of the winding drum 92, and thus either diminishes or com` pletely stops the forward feeding of the. machine, according to the increase in the load. As soon as the action of the cutting mechanism has caused the load to diminish, the current drawn by the motor falls, the solenoid 82 allows lthe core 81 to rise, and the spring causes a more or less complete resetting of the clutch 73, thus again stopping or retarding the reaction gear 51 and furnishing' the necessary resistance for the forward driving of the sun gear 52 and the winding drum 92. The solenoid may be made to operate its core through the entire range of movement on acomparatively small variation in current, thus maintaining the load and the current'demanded thereby substantially constant within narrow limits. The load cannot be made to exceed this upper limit by any manipulation of the thumb screw 69. Y Y

In practice, the machine after once having been set in position', is allowed to operate automatically, the thumb screw G9 being tightened to hold the brake casing 67 abso-` lutely stationary, and the solenoid S2 controlling the setting' and releasing of the brake 73 as-required in order to maintain the load on the motor 11 substantially constant, and to vary the rate of feeding in inverse proportion to such load. Yet the rat-e of feeding can also be controlled manually, at will, and this can be done without any danger that the manual control will produce too great a load on the motor, as the autof matic controlling devices are always in readiness lto assume the control when the load reaches a predetermined value. The rate of feeding can be varied as desired so long as the load on the motor produced by reason of such feeding remains below a predetermined value, but cannot be varied by the manual control means, which is the thumbscrevvv 69, to produce a greater load than Ithis predetermined maximum. In addition, the loadv control makes it absolutely impossible to stall the motor, by preventing an overload; thus making it possible to use alternating cnrent motors without the usual danger of their stalling, and of the consequent short circuit on the supply line.

It will be seen that, should the cutting mechanism strike an obstruction, thereby arresting the movement of the machine, the increased load imposed upon the motor will cause. the operation of the feeding 1necha nism to be immediately stopped by operatively disconnecting the same from the motor, said feeding mechanism being thereafter reconnected when the obstruction is. removed, all without stopping the action of the cutting mechanism and independently of the relative movement thereof.

In the form of my invention described above and shown in Figs, l to 5 inclusive, the automatic and manual clutch-controlling means both control the connection of the reaction gear to a stationary part, so as to allow more or less slipping between the reaction gear and the stationary part. It is not necessary, in the broader aspect of my invention, that this clutch be thus located. In the arrangement shown in Figs. 6 and 7, a modified form of the inventionis shown, in which this clutch controls the connection between the reaction gear1 and other parts of the variable speed drive for the feeding mechanism.

In this modified form of my invention, the shaft 16 carries the worm 40 which meshes with the worm wheel 41 fixed., on the shaft 42 exactly as in the form shown in Figs. 1 to 5 inclusive, so that such shaft is driven constantly by the motor 11 .when such motor is in operation. However, instead of having two-pinions 43 fast on the shaft, as in the arrangement first described, two pinions 4S are mounted on a sleeve 100, which is loosely mounted on the shaft 42 and is fixed' to a elutchcasing (37', between which and the shaft '42 is a' multiple disk clutch 73. 'hen the clutch 73l is set, vthe sleeve 100 and gears 43 rotate with the 'shaft 42, but when the clutch 7 3 is released, there is more or less slippage between the shaft 42 and the sleeve 100, the amount of such slippage depending upon the degree to which the clutch is released. The settin and releasing of the clutch 73. is contro led by a A mounte on the shaft and spring-pressedto a position te set the clutch 73 by a spring `75-which surroundsthe hub of the disk 74 and actsibetween ysuch disk and a thrust bearing 76 bearing `against the gear casing 25. The disk 74 has a peripheral llange 77 which may be engaged by a pair of ,rollers 7 8 mounted on a forked lever 79' which straddles the disk 7 4 and is pivotally mounted on a iixed pivot pin 80 suitably supported on the frame or casing'25. The lever 7 9 is connectedto the movable cofre 81 ofthe solenoid 82, which are the same and act in the same wa as in the form shown in Figs. 1 to 5 inc usive. The pinions43 mesh with duplicate gears 44 of a `planetary gear structure exactly like thatin the -arran ement shown in Figs. 1 to 5 inclusive, inc uding the same gears 44, sleeves 45 and 46, shait 47, bolts 48, planet gears 49 and 50, sun gears 51 and v52, sleeve 53, sliding sleeve 54 splined on the shaft 53, linger 55, shift lever 56, teeth 5?, 58, and 59. Instead of teeth 60 on a worm wheel, however, there are teeth 60 on a fixed member 102, so that when the teeth 59 and'60 are in engagement the reactionI ,gear- 51 is i positively held stationar In the operation o the arrangement shown in Figs. 6 and 7 the same general results are obtained as inthat shown in Figs. 1 to 5 inclusive. When the sleeve 54 is in, its middle position no feeding is ob= tained, as the reaction gear 51 is free to rotate. l When the sleeve 54 is thrown to the right to cause intermeslfingof the teeth 57 and 58a quick feeding is prevented trom action of the solenoid `82 onl the clutch 73.-

causing an overload on the motor byy'the Vlhenl the sleeve 54 is thrown to the left'to cause intermeshing of the teeth 59 and 60', the reaction gear 51 is positively held stationary, so that when lthe clutch 73 is set the shaft 47 is driven to operate the drum 92, exactly as in the arrangement shown Ain Figs. 1 to 5 inclusive. However, if the feeding which results from this operation of the drum 92 causes the load on the -motor to demand too great a current, the solenoid 82 draws in its core 81 and thereby operates the lever 79 to move the disk 744 to the right against the spring 75 to release the 'clutch 7 3, to a greater or less extent, thus allowing slipping between the reaction gear 51 and the shaft `42 and thereby diminishing or stopping the feeding action of the drum in or out to cause a releasbing or settingofthe clutch 7 3 and thus to ,feeding operation always'maintains the load A on the motor at a substantially constant more rollers 103 are carried by a slidablemember 104 which is screw-threaded and provided with a nut 105 which (2o-operatesl with the casing 25 to slide the member 104. The rollers coeoperate with the flange 77' oft' the disk 74 to shift such disk against the spring 75 to release the clutch 73. Manipulationof the manually controlled nut 105, however, can not cause an undue increase ot' load on the driving motor 11, because the `rollers 78 are always in readiness for operation by the solenoid 82 to release the clutch 73 whenever the load on the motor requires it.

The species ot my inventionlast described forms the subject matter of my divisional application, Serial No. 722,373, filed J une 25,1924..

y As a result of my improved construction it will be noted that it is possible to control the feed oi the mining machine and the controlling means thereforby means responsive to the resistanceto cutting in such a manner as to make the operation of the machine .automatic in this respect and eliminate the abusesot the machine possible in the hands of an ignorant operator. Attention is also directed to the fact that through my improvedl construction it is made possible not Vonly to control the feed over a wide range through my improved reactiony gearing, but also to simplify and improve the connections between the motor armature and the 1 feed operating member, my improved reduction mechanism being carried on only two transverse members, herein shafts, one of which is connected to the motor armature and the other ott which is connected to the feed operating member, and so arranged with its meshingl elements on each of said members that not only may one member assume the form of a stub or ack member, but that the two members may be disposed adjacent one another and directly connected. Through the provision of my improved variable speed transmission mechanism connected between the transverse members, it will be observedlhgtit is also made possible while maintaining this simplilied arrangej ment to drive the feed operating member at a pluralityof predetermined speeds and it Adesired have each subject to friction control as shown in the modified construction illustrated. through my improved connection to the Further it will be noted thatl worm including the bevel gear rotatable on an upstanding axis above the worm, 1t is made possible to simplify the driving con-H nection between the latter and the armature shaft and aty the same 4time itc permit 4,the

bevel gear to be removed through the top of.

' the frame whenever it is desired to obtain access to the worm and the other cooperatn ing gearing. Moreover, as a result of my improved construction including the cutter chain sprocket on a stub shaft and the connection of the feed operating member and cutter cha-in driving mechanism to means onvthe upstanding member driven by the overlying bevel gear, it Will be observed that it is made possible to produce an eX- ceedingiy compact construction while at the same time giving a relatively large space above the sprocket for the feed driving mechanism. By driving the cutter chain sprocketthrough the large holloWed-out spur gear meshing with the spur pinion on the upstanding member, these advantages are further accentuated, While b, the use oli' the large cutter chain sprocket t riving gear located as discloqsed and rotatable at the speed obtained this gear is also rendered adaptable to use as a truck driving gear meshing directly with a cooperating meshing member on truck driving mechanism of standard construction. By the provision of my improved lubricantl containing casing, it. is also made possible to maintain the feed gearing properly lubricated While through the provision of my improved connections between the casing and the cutter chain driving sprocket, it is made possible to keep this element automatically lubricated from the casing. These and other advantages of my improved construction will, however, be clearly apparent to those skilled in the art.

This application is a continuation in part of the application which has matured into my Patent 1,173,170, granted Feb. 29, 1916.

While I have in this application spcciically described several forms which my invention may assume in practice, it wilt be. understood that these forms of 'the same are shown for purposes of iilustration and that the invention may be modified and embodied in other forms without departing from its spirit or the scope of the appendiisd claims. p

I claim as my invention: l. In combination, a cutter, e. driving motor therefor, a feeding device for feeding said cutter, said 'feeding device being driven from said driving motor, and means for automatically varying the speed of opera tion of said feeding device in relation to that of said driving motor to maintain the load on the cutter constantkand for manually varying the speed of operation of said feeding mechanism. with relation to that of the driving motor to reduce the load on the cutter tu' any value below that at which the feeding is controlled automatically.

2. In combination, a cutter, a driving motor therefor, a feeding dev-ice for feeding said cutter, said feeding device being driven waarna from said driving motor, and means for automatically varying the speed of operation of said feeding'device in relation to that of said driving motor to maintain the load on the cutter constant.

3. In combination, a driving motor,.a. working device driven by such motor, a feeding device, a gearing through which said 'feeding device is driven, said gearing including two members between which said driving motor produces a reaction, a stationary part, one of said members being connected to said feeding device, an auto* matic clutch and a n'ianually-controlled clutch one of which acts through the other to connect parts of said gearing through the other of said members to the stationary part and both of which must be set to produce the reaction, and means responsive 4to the load on said working device for controlling said automatic clutch.

d. In combination, a driving motor, a Working device driven by such motor, a feeding device, a gearing through which said feeding device is driven, said gearing including two members between which said driving motor produces a reaction, one of. said members being connected to said feeding device, a stationary part, an automatic clutch acting lo connect parts of said gearing through said second member to the stationary part, and means responsive to the load on said Working device for controlling said automatic clutch.

5.111 combination, a driving motor.l a working device driven by such motor, a feeding device, a gearing through which said feeding device is driven, said gearing including` tivo members between 'which said driving motor produces a reaction, one c? said members being connected to said feed ing device, a stationary part, an auton'iatu: clutch and a manually-controlled clutch cnaot' which acts through the other to comici-t parts of said gearing through other oi said tivo members to the stationa ry part und both ot' which must be set to produce thc reaction, and an electro-magnetic device 'which is energized in proportion to the load on: said ivfnlzing device and acts yto release said auton'iatic clutch progressivciy as such load increases.'

6. ln con'ibination, a driving motor, a working device driven by such motor, a feeding device., a gearing through which said feeding device is driven, said gearing includingl tivo members between vwhich said driving motor produces a reaction. one of said members being connected to said feed. ing device. a stationary part, an automatic clutch acting to connect parts of said gearing through said second member to the stationary part, and an electromagnetic de'- vice which energized in proportion to the .load on said Working device and acts to retatable together, a stationary part, a connection from said driving motor for driving said planet gears around the axis of said sun gears, an automatic clutch for connecting said stationary part through said second sun gear to the remainder of the aforesaid gearing to produce a driving reaction for the feeding device to Work against, and an electrofmagnet which is energized substan-l tially in proportion to the load on the driving motor and acts on said automatic clutch to release it progressively as such load increases.

15. In combination, an electric driving motor, a Working device driven from such motor, a feeding device, two sun gears of different size, one of said sun gears being connected to said feeding device, planet gears meshing respectively with said two sun gears and rotatable together, a stationary part, a connection from said driving motor for driving said planet gears around the axis of said sun gears, an automatic` clutch for connecting said stationary part through said second sun gear to the remainder of the aforesaid gearing to produce a driving reaction for the feeding device to work against, a manually operated device for reducing the reaction effect produced by said automatic clutchand an electromagnet connected in series with said driving motor and tending to release said automatic clutch..

16. In combination, an electric driving .inotor, a working device driven from such motor, a feeding device, two s un gears of dierentsize,'one of said sun gears being connected to said feeding device, planet gears meshing respectively with said two sun gears and rotatable together, a stationary part, avconnection from said driving motor for driving said planet gears around the axis of said sun gears, an automatic clutch for connecting said stationary part through said second sun gear 'to 'the remainder of the aforesaid gearing to produce a driving reaction for the feeding device to work against, and an electro-magnet connected in series with said driving motor and tending to release said automatic clutch.

17. In combination, ya driving motor, a feeding device, a gear connected to said feeding device, a reaction gear, means driven by said driving motor operatively connecting and tending to move both of said gears, a wormwheel driven by said reaction gear, a worm meshing with and driven by said 'worm wheel. and a brake for controlling the nrotion of said worm.

18. In combination, a driving motor, a working device driven thereby, a feeding device, a gear connected to said feeding device, a reaction gear, means driven b v said driving motor tending tomovc said two v.gears in opposite directions. a worm. wheel driven by said reaction gear, a Worm meshing with and driven by said worm wheel, a brake acting on said worm, and means for releasing said brake progressively as thel load on the driving motor decreases.

19. In combination, a driving motor, a

working device driven thereby, av feeding device, a gear connected to said feeding device, a reaction gear, means driven by said driving motor tending to move said two gears in opposite directions, a worm wheel driven by said reaction gear, a worm meshing with and driven by saidjvorm wheel, a brake acting on said worm, and an electromagnet which is energized in proportion to the load on the driving motor and tends to release said brake.

20. In combination, an electric driving motor, a Working device driven thereby, a feeding device, a gear connected to said feeding device, a reaction gear, means driven by said driving motor tending to move said two gears in opposite directions, a worm wheel driven by said reaction gear, a worm meshing with and driven by saidV worin wheel, a brake acting on said worm, and an electro-magnet connected in series with said motor and tending to release said brake.

2l. In combination, a driving motor, a feeding device, an element driven by said driving motor. two members between which said element is interposed and produces a reaction, 'one of said members being connected to/said feeding device, a releasable brake acting on the other of said members, and means for diminishing the braking action thereof automatically as the resistance to feeding increases.

22. In combination, a driving motor, a feeding device, two sun gears of different size, one of said sun gears being connectedv to said feeding device, planet gears mcshinr respectively with said two sun gears anu rotatable together, a connectionl fromI said driving motor for driving said planetggears around the axis of said sun gears, a releasable brake acting on the other sun gear and means controlled by the load on said motor for controlling said brake.

23. In combination, a driving motor, a Working device driven by such motor, a feeding device, a driven gear including two members between whichthe driving produces a reaction, one of said members being connected to said feeding device, a releasable brake acting on the other of said inem` 45 actln. on said Woiirodnces a reaction one ou" said member automatic brake and a manual brake acting varying" tbe in tandem on the other of said members, in said variable speed d ii and means for releasing' said automatic producen speed ieedin brake progressively as the load on Said driv inverse sense as suoli loa/e., i ing motor increases.- 3]. in combination, e, ci 25. ln combination., a rotatable member. a motor therefor, a ieedingie; driven gearing including;- two members besaid cutter, a driviintg4 y'conne-,c

tween which tbe driving produces a reaction, said motor and said feeding; one of said two members being` connected to driving connectitm'` in.clotting' a H1* said rotatable membei, and automatic releasable friction device and iii/iai' i brake and a manual brake acting in tandem trolled by tbe load on tbe motor 1;' on the other of said two members. trolling said vaiiabiy eeleaeable 1 2G. ln combination, a driving motor, a device. working device driven by' such motor, a 3Q. ln combinatin, a irivingi' motor, l5 feeding device, a. driven gearing' including Working" device driven by suoli menor, a L@ .tvvo memberel between which a reaction is "eedngg' devis; a ring driven bjfmeiiol.: produced by its driving, one of said members driving motor ano. 'lingtwo me ibers being' connected to said :feeding device, ay dietween which said driving` moto? pi rotatabl)7 mounted brake casing', 4an autoa reaction, one oi' said members beine, 2@ matic brake connecting; said brake easing neet-ed to said feeding; device, a clutch aei'ii and the other of said two members, a manual sociated with said and controlling brake for controlling tbe movements of said the reaction produced bete-:een said two brake casing, and means controlled by tbe members. and means respoinnve to` the load load on said driving motor for releasing said on 'tbc working deviceioicontrolling, M automatic brake progressively as the load clutch. V on the drivinginotorincreases, 33. la combination, :i driving inf- 27. lncombination, a rotatable member, 'workingdevice dri/'en l," suell renten a drivengearing` including two members ing device, gearing" driven by ei betweenfwhicb a reaction is produced by its ing motor and incluf two ,1r I 3@ driving, one of said Wo members being tween which said diingnioto connected to said rotatable membei, notat reaction, one of ably mounted brake casing'. an automatic neeted to said feet.

rake connectingr said brake casing and tbe sociated with .sa other of said two members, and a manual the reaction `pro 3&3 brake for controlling tbe movements of said membere, and an brake casing. which is'eneigiz 28; lin combination, a rotatable member, on world driven gearing including two members besaid clutcbpri, tween which. a reactionis produced by its creases, i

40 driving, one of said tvvomembei'e being conln comb?,

nected to said rotatable member, a' woz-ni motor, a Wolle-n1' `Wheel driven `by the otlielff ort' said tivo me1nmotor, a :Feeding f ers, a Worm meshing with and driven by by such driving motor and ir 1 said Worm Wlieel, and a releasable brake members between Wbicli said drivinl nio fn" idd ln combination, a` cutter, a di'iving being connected to said feeding device, motor therefor, a feeding;` device for feeding clutch associated said gearing* and said cutter, a variable speed driving controlling the reacti'cm produced bclveeii nection between said driving' motor and said two members. and

`50 feeding' device. an automatic device connested in series trolle'd by the load on the drivingn motor ion inn; to release sani clinch. varying tbe speed relationsbijo of the parte 3:1 'ln combination.` a-

Y I in said variable speed' driving connection feeding' device, veit by vsnob to produce a speed of 'eedingvvl'iiclln varies driving motor. vo members between itbicb, i

55 in inverse sense as such load, and manually said element is interposed and. 'produces a im operated means iol* varying' such relareaction, one of said members' ben i con tionsbip to produce any speed of feeding y nected to vsaid feeding device, and a l l below that at which said automatic device associated with sali- Operates. i tbeieaction 'proifnced b Said y i@ l30. In combination, 'a cutter, a driving" members, said ci n. being, ignota Lb motor therefor, a feeding device for feeding leasabzle to permit ainv7 desired l i* said cutter, a variable speed driving connec- 36. .ln coin,

5 trolled by tbe load on' tbe driving motor for including an el.'

ination, a d

a` gearing 'el Vice ie d 'v-en, f inient diiven l and two members between which said element is interposed and roduces a reaction,

one of said members eing connected to said feeding device, a stationary part, and an adjustably releasable clutch acting to connect parts of said gearing through said second member to the stationary part.

37. In combination, a driving motor, a feeding device, two coaxial gears of differ.- ent size, one of said coaxial gears being connected to said feeding device, planet gears meshing respectively with said two coaxial gears and rotatable together, a Istationary part, a connection from said driving motor for driving said planet gears around the aXis of said coaxial gears, and an adj ustably releasable clutch for connecting said stationary part through said second coaxial gear to the. remainder of the aforesaid gearing to produce a driving reaction for the feed-y ing device to work against.

38. In combination, an electric motor, a working device driven thereby, a feeding device operated by said motor to feed said working device to its work, and means controlled by the current taken by said motor for varying the rate of operation of said feedino' device to maintain such current substantially constant. 1

39. In combination, an electric motor, a

,working device driven thereby, a feeding device, a driving connection interconnecting said drlving motor and said feeding de- -vice andincluding two parts which can slip relatively to each other to control the relation between the speeds of the driving motor and the feeding device, and means for controlling lthe slipping of said two parts by the current taken by the motor to vary the ratio of the speeds of the feeding device and the driving motor in inverse sense as such current.

40. In combination, an electric motor, aA

Working device driven thereby, a feeding device, driving connection interconnecting said driving motor and said feeding device and includingr two parts which can slip relatively to each other to control the relation between the speeds of the driving motor *and the feeding device, and means for conincassa device driven by said motor, and means responsive to the load upon said motor for controlling the connection ofA said clutch.

43. In combination, an electric driving motor, a working device driven by said motor, a feeding device, means for operatin said feeding device from said motor, sai means including a friction clutch, a solenoid connected in the armature circuit of said motor, and means controlled by said solenoid for operating said clutch.

44. In combination, a cutter, a driving motor therefor, a feeding device for feeding said cutter, said feeding device being driven from said motor, and means for controlling the operation of said feeding device by said driving motor normally under manual control and automatically operable when said cutter strikes an obstruction to disconnect said feeding device from said motor and thereafter reconnect the same.

45. In a mining inaohine, in combination, an actuating shaft, feeding mechanism including a feed shaft operatively connected with said actuating shaft and having transmission and controlling devices thereon, and cutting mechanism including a shaft arranged transverse to said feed shaft in substantially the vertical plane thereof between certain of the devices thereon, said cutting mechanism shaft being operatively connected with said actuating shaft independently of the connections between said actuating shaft and said feed shaft.

46. In a mining machine, in combination, an actuating shaft, feeding mechanism including a feed shaft operatively connected with said actuating shaft and having transmission and controlling devices thereon, and cutting mechanism including a shaft arranged transverse to said feed shaft in substantially the vertical plane thereof between certain of thedevices thereon, said cutting mechanism shaft having thereon a gear operatively connected with said actuating` shaft and dished to receive the transmission devices on said feed shaft.

47.' In a mining mach-ine, feeding mechanism comprising a transmission shaft, a feed shaft, a pair of gears onsaid transmis. sion shaft, a pair of gears on said feed shaft meshing with said first named gears respectively, studs rigidly connecting said last named gears, planet gears rotatably mounted on said studs, and a sun gear on said feed shaft co-opcrating with said planet gears.

48. In a mining machine, in combination, a casing, an upright shaft having a bearing in the upper wall of said casing, transmis sion mechanism within said casing including elements on said shaft, and means for su plying lubricant to said bearing from tllie exterior of said casing, the uppermost of the elements on said shaft having an upright flange surrounding said bearng'for' llO y nism,` means for `operating said feeding assenza retaining lubricant therein While permitting said lubricant to overflow into said casing to lubricate the transmission mechanism therein.

49. In a mining machine, in combination, a casing, transmission mechanism therein including a shaft having a bearing beneath said casino', means for supplying lubricant to said casing to lubricate said transmission mechanism, and an overflow device for conducting excess lubricant from said casing to said bearing. v

. 50. .In a mining machine, a motor, cutting mechanism foperatively connected thereto, feeding mechanism for said cutting mechanism, means for operating said feeding mechanism from said motor, said means including yafriction clutch, a. -manually operable controlling member for said clutch, and means forinhibiting loading of said friction clutch by said manually voperable controlling meinber While permitting the manipulation norlmally effective to cause loading.

51. Ina mining machine, a motor, cutting mechanism operatively connected fthereto, feeding mechanism for said cutting mecha-l nism, means for operating said feeding mechanism from said motor, said-means including a friction clutch, manually operable clutch controlling means, and automatic means responsive to resistance to cutting for inhibiting loading of said clutch by said manually operable means.

52. In a mining machine, a motor, cutting mechanism operatively connected thereto,

feeding mechanism, means for operating saidfeeding `mechanism from said motor, saitlmeans including a friction clutch, manuallyf operable clutch controlling means, and automatic means responsive lto resistance to feeding Afor inhibiting loading of ,said clutch by said manually operable ineaiis.

,53.1111 a mining machine, a motor, cutting mechanism operatively connectedv thereto, feeding mechanism for said-'cutting mechamechanism from said motor, said means includingfa friction clutch, manually operable clutchpontrolling means, and means responsive toc resistance to cutting for releasing said clutch despite reverseoperation of said manuallypperable means'.

54. In a mining machine, a motor, cutting mechanism, operatively connected thereto, feeding mechanism 'for said cutting mechai'iismY means for operating said feeding mechanism lfrom said motor, said means including a friction clutch, manually operable clutch controlling means, and means :responsive to resistance to feeding or releasing said clutch despite reverse operation of said manually operable means.

- 55. AIn a mining -machine, a machine frame, a 'motor thereon, a feed operating member thereon, variable speed transmission tively connected between the same and said feed operating member, a closed lubricant containing casing enclosing said variable speed transmission mechanism, and a cutter chain driving sprocket operatively connected to .said transmission vmechanism and located outside of said casing.

56. In a mining machine, a machine frame,

a motor thereon, a feed operating member thereon, transmission mechanism driven by said motor and operatively connected between the saine and said feed operating member, a closed.lubricant containing casing enclosing said transmission mechanism, and cutting mechanism ii'icluding a cutter chain driving sprocket operatively connected to said transmission mechanism and located outside of said casing. 57. ln a mining machine, a machine frame, a motor thereon, a feed operating member thereon, variable speed transmission mechanism driven by said motor and operatively connected between the same and said feed operating member, a closed lubricant containing casing enclosing said variable speed transmission mechanism, a cutter chain driving sprocket operatively connected to said motor and located outside of said casing, and means for supplying lubricant from said casing to said cutter chain sprocket.

58. In a mining machine, a machine frame, a motor thereon, a feed operating member thereon, transmission mechanism driven by said motor and operatively connected between the lat-ter and said feed operating member, a closed lubricant containing casing enclosing said transmission mechanism, cutting mechanism .including a cutter chain driving sprocket driven by said transmission mechanism and located outside 4of said casing, and means forsupplying lubricant from said casing to said cutter -ch ain sprocket.

-niechanisni including a cutter chain driving sprocket drivena by said transmission mechanism and located outside of said casing, and means for supplying lubricant from said fusing to said cutter chain sprocket.

60. In a mining machine, a machine frame, feeding mechanism thereon including a feed operating member" rotatable on a transverse axis, a horizontal motoren said, frame rotatable on' an axis extending lgngi-v feed operating shafts,

fil

tudinally' thereof, operative connections becutter driven by said transmission mec located outside of said casing, and means lor supplying lubricant from said casing to said cutter chain sprocket.

61. In a mining machine, feeding mechaiiism including a feed operating member zoiital motor rotatable on a longitudinal axis, a

plurality of transversely disposed operative connections between one of said shafts and said feed operating member and between the other shaft and said motor, variable speed reduction gearing operatively connected between said shafts, a lubricant containing` casing enclosing said gearing, and cutting mechanism driven b v said motor including a cutter chain sprocket located beneath said casing and receiving lubricant therefrom.

62. A room and pillar machine comprising a machine frame. a horizontal motor thereon having an armati-1re shaft rotatable on an axis extending longitudinally of said frame, an upstnnding riviiig member carried on said frame and disposed in rear of said motor, driving connections between the rear end of said motor and said member comprising a pinion on said shaft and a gear meshing therewith and carried on said inember, cutting' mechanism including a cutter chain driving sprocket in a plane beneath said motor, operative connections between said sprocket and said motor whereby the former is rotated, and mechanism for feeding said frame bodily laterally along a mine face including a feed operating member on said frame, and driving'connections for said feed operating member including a worm on said upstanding member.

63. In a mining machine, frame, ahorizon a1 iiections between said motor and said member cutting mechanism including, a cutter chain driving sprocket in a plane beneath said motor and operatively connected to said member, a rotatable worm fixed on said 64. In a mining machine, a machine a horizontal motor thereon rotatable on an axis extending longitudinally of said frame, an upright driving member carried on said frame in rear of said motor, operative connections between said motor and said member, cutting mechanism including a cut. ter chain driving sprocket .in a plane be tions. a transverse shaft in rear of said rotatable by said and disposed on said transverse shaft,

frame bodily laterally along a mine face including a feed operating member on said frame, and variable speed transmission said feed member and said shaft.

n a mining machine, a machine frame, a'horizontal motor thereon rotatable on an axis extending longitudinally of said frame, an upright driving member carried on said frame in rear tive connections between said motor and said ter chain driving sprocket operatively connected to said memb lixed on 4said member to the latter of said first mentioned operative connections, a )vorm gear rotatable by 'said .worm and disposed on a transverse axried on said frame and disposed in rear of' 'said motor, driving connections between the rear end of said connection of the other of said driving connections thereto.

6r. In a mining machine, a y machine frame, a horizontal motorthereon rotatable operating mi mii; oi: ending longiudimilljv olE said imif; :mi iiifoiiiudiii driving member cai'- :o mid oiled iii voor off ons bom/oon lili@ f '"1' :md filo oppor omi. mofilifiiiisii includ" mid iiioioi' mid folio :er man, bei?, milling; iieohziiiiism i.iicl-udii'f" ai millor chairs driving; spioolio, opoimivo comme lions between time siiL and tho lower 9nd o1? i'nomlioi.l flou; 3io i; mism.

l foi? 'oodi s ooo r, #sally along mino foo-fz ii'ifoliligli'fig ii, fo. opo"ai;-

mambo-i' on Hansi/Torso im ioiajalilo on said food oper Alfil Y ming' i'iieifiiliei? 1v@ svoiso iii'iflfiiibeits7 o, 'worm amd @on ooo of 'labo somo sind Said igiiiioiiiiii-iiw memlioi?, and. variable wood con Sold iiiomlieis,

ii iriiiiing mao me? im mooi iidmg d azur vind on ,ixiiiiliommo l Said. itc. toi' o,

coniiooiioi momiioi and 'ivoi'm gooi between on@ o'i tino ess-ine and.

said upstanoiing member, plural prodolio Y iriiiiod speed ,gearing boiwooo Said "cimisvoise minors, and zofliiolion wearing boi-,woon ih@ l'iziiieivoiso iiiomoois and said 'lood op @railing iiooiioifioi.

"llll il ifo-om and pillar mining muohio@ sliduil'ilo om ils lioigon including' o, )floot-oi? :.1 i1 upssimdiog memooi' longitud n allyt spam, fiom said moloi', i cutter Chain diiviiiig' @voulu-,iv ioiigiludimlly spoood fiom Said ii" mbar, lateral feeding' mooi piiism includ.-

" liloliei dispoood ivfiiiovogrsolv noi odio nj lj abovo said Sprocket? mid mooi if: im. diving; both said spvooloi; and said transverse member from Said motor iiioludiug driving moans Coaxiai Wilii smid opstanding mombe'.'

7L rooiz'i, and pillar mining maxzhine slidolilo on its looiom iiofludiiig i, motor, on opstanding' momiier iiially'spaood from said molzo'rj a @uit chain driving; spifockel', longitudinally Spced from said momias? and moro iomolo ibhan said member fiom said iiiotoi, iolorfil foodng mechanism including o meml'ei; disposed transversely :iliove said sprocket, and :moans for' driving both Said spiocliot and said llaiisvorso memlioi.' ieioin inolor including a oir/el gear ozii'riocl on Said ilpsiiaidiig momooi'.

il room and Pillai? mining machin@ Slidzdolo on itsrrbotlzoi'o including a, moto?, an upsiaiidiilg member longitudinally opac/ed `i'ifoiii .Said iiiiitol; a (falloir chain driving;

spioolot longindiimlly spaced liom Said moiiilmif9 moons .totaling said spioclet 'irom said moto? including o, moinliev ooaxial with said misto/nalin@ mombe, and lab eral ooding moolmnism liliozvisofdiriven by solid motor including ai member disposed 'with iis iixio in zi horizontal plano above said Spi'oclioi and in :i jiosilion iii suoli plane suoli linux its voi'zicol project-imi substantially l i Socio wid spiockels.

73. il. 'room and pillar mining' machine Slidalilo on its bo'tom inoliidiiigg culto?? dirving mechanism including er ou ,i3 'olian spiookot and a. coaxial with and of diametoi tlifim smid Sprocket and no oo'sil lo 'from ono ood o'i the maitliiiief, lili/oral foodiig moohanism including a izionsversely oixending member disposed also@ said geni; o, motor, mid foi' fliiviiig "both said nioolmmisms ilioieiiom including a beval gem driven 'by sai-id moioi:

74. A ioom d pill-air minimo' ioaoliino bio omino bottom comprising a roof bei driven by said l; driven. by Said bevel outlo'f clm'm A mom and pillar mining machine Slidalolo on o. mino boli-om omp'iioing 2i mo 'lor disposed longitudinally iliei'eo-, un upstanding; member in ol said motor, u culte? oli ain driving sprocket in rear of said member," bowel geaifiiig on, said mombei? dif-ivanv by said motor, md spur geaviiig driven lijf said bevel gearing and driving said. Cutler chain sprocket including loigo Spui? goa' coaxial "with said Sprocket and adapted lo be moved into mosh Willi and opoiaivoly engage aJ truck driving elementlr6. A room :md pillar mining' machine slidalolo on its bottom on i :mme bottom oompirging a, moom viii upiiiiadngmiembov in,

rear thereof, a cutter chain driving sprocket in rear of said member, sprocket driving connections driven by said motor including a member carried on said opstanding member and a hollowed-out gear, and means for feeding the machine laterally likewise driven by said motor and disposed above said gear and having a portion extending into the hollow therein.

77. A room and pillar mining machine including a machine frame` a motor thereon having its armature shaft rotatable on an axis extending longitudinally of said frame, an upstanding member carried n said frame in rear of said motor, cutting mechanism including a' cutter chain driving sprocket, feeding mechanism for lfeeding said frame bodily laterally along a mine face including a feed operating member rotatable on a transverse axis, a rotatable gear disposed on said upstanding member, operative connections between the same and said feed operating member, and means for rotating said sprocket and said rotatable gear by power from said motor including a bevel pinion on said armature shaft and a bevel gear meshing with said pinion and disposed on said upstanding member above said rotatable gear,

78. A room and pillar mining machine including a machine frame, a motor thereon having' its armature shaft rotatable on an axis extending longitudinally of said frame, an upstanding member carried on said frame in rear of said motor, cutting mechanism in'- clnding a -cutter chain drivingsprocket, feeding mechanism for feeding aid frame bodily laterally along a mine face including' a 'leed operating member rotatable on a. transverse axis a rotatable gear disposed on said upstanding member, operative connections between the same and said feed operatinUV member, and means for rotating said sprocket and said rotatable gear by power from said motor includingi a gear member on said armature shaft and a gear member meshing with said last mentioned gear member and disposed on said upstanding' member in a position above said rotatable gear.

79. A room and pillar mining machine including a machine frime, a mot-or thereon having its armature shaft rotatable on an axis extending longitudinally of said frame, an upstanding member carried on said frame in rear of said motor, cutting mechanismincluding a cutter chain driving sprocket, feeding' mechanism for feeding said frame bodily laterally along a mine face including a. feed operating member rotating on a hori- '/,ontal axis and a rotatable gear disposed on .said upstanding member and operatively connected to said 'feed operating member', and means for rotating said, sprocket and said rotatable gear including a pinion on said armature shaft and a gear meshing with seid pinion and disposed on said upstandng member in position overlying said rotatable gear.

80. A room and pillar mining machine including a machine frame, a motor thereon having' its armature shaft rotatable on an 70 axis extending longitudinally of said frame, an upstanding member carried on said frame in rear of said motor, cutting mechanism including a cutter chain driving sprocket, feeding mechanism for feeding said frame bodily laterally along a mine face including a feed operating member and a rotatable worm disposedon said upstanding member and operatively 'connected to said feed operating member, and means for rotating said sprocket and said worm by power from said motor including a pinion on said armature shaft and a. gear meshing with said pinion and disposed on said member above said worm, u

81. A room and pillar mining machine in cluding a machine frame, a motor thereon having its armature shaft rotatable on an axis extending longitudinally of said frame, an opstanding member carried on said frame in roar of said motor, cutting mechanism including a cutter chain driving sprocket, feeding mechanism for feeding said frame bodily laterally along a mine face including a feed operatingT member, a rotatable worm disposed on said upstanding member, and operative connections between said Worm and said feed operating member including a worm gear rotatable on a transverse axis, and means for rotating said sprocket and 100 said worm by power from said motor including pinion on said armature shaft and a gear meshing with said pinion and disposed on said member above said worm and worm gear.

82. A room and pillar mining machine including a machine frame, a horizontal motor thereon rotatable on an axis extending longitudinally of said frame, cutting mechanism thereon including a cutter chain driving sprocket,`means for driving said sprocket from one end of said motor including a horizontally disposed bevel Iwear, mechanism for fcedinfT said frame bodily laterally along a mine ace including a feed operating member rotatable on a transverse axis, and speed reducing driving connections between said bevel gear and said feed operating member including a plurality of operatively connected transverse members one of which is dis E20 posed beneath the plane Aof said bevel gear.

A room and pillar mining machine including a machine frame, a horizontal motor thereon rotatable on an axis extending longitudinally of said frame, cutting mechanism 25 thereon includinfr a cutter chain driving sprocket, means ror driving said sprocket from one end of said motor including a hori- Zontally disposed bevel gear, mechanism for feeding sai freine bodily laterally along a ma .almanac 1 y 15.7

mine face including a feed operating mem ber rotatable on a transverse axis, and speed reducing driving connectionsbetvveen said bevel gear and said feedoperating member o including a plurality of longitudinally spaced transverse members each disposed below the plane of said bevel gear.

84. A. room and pillar mining machine including a machine frame, a horizontal ,10 motor thereonrctatable on an axis extending longitudinally of said frame., cutting mechanism thereon including a cutter chain driving sprocket, means for driving said sprocket from one end of said motor, mechanism for feeding said frame bodily laterally along a mine face including a feed operating member rotatable on a transverse axis. and operative connections between said driving` means andsaid feed operating member operatiye to rotate the latterat a plurality of predetermined speeds including a plurality lof transverse members und variable speed transmission mechanism between saidtransverse members..

85. ln a mining machine, amachine frame, a horizontal motor thereon rotatable on an anis extending longitudinally of said frame, cutting mechanism thereon including a cutter chain driving sprocket, means for drivm ing said sprocket from one end of said motor, feeding mechanism. for feeding .said frame bodily .laterally along a mine face including a feed operating member, and operative connections between said driving means and said feed operating member including a pair of transverse members, one comprising the sole driving member and connected said driving means and the other comprising the sole driven member and having a-direct geared connection with said feed operating member, and speed reduction mechanism between said transverse members carried by said members..

86. ln a mining machine, a mhnhine frame, a horizontal vmotor thereon rotatable on an axis extending'longitudinally of said frame, cutting mechanism thereon including a cutter chain driving sprocket, means for drivw ingsaid sprocket from the rear end of said motor including a bevel gear-rotatable on an upright axis. mechanism for feeding said frame. bodily laterally along a. mine face including a feed operating member. and operative conncctions; between said bevel ,fre-ar and said feed operating member including a. pair of transverse members. one directly connected to said driving means and the other directly geared to said feed operating` member, and speed reduction mechanism betvveeny said transverse members having its elements rotatable about the axis of one or the other thereof;

8'?. ln. a mining machine, amachine frame, a. horizontal motor thereon rotatable ce en axis extending longitudinally of seid frame, cutting mechanism thereon including a cutter .chain drivinsprocket, means-'- for drivingsaid sprocket om the rear end of saidmotor including a bevelgear `rotatablef on an upright axis in a position above the axiscf `rotation of the motor,1 mechanism 4for `feeding said .frame bodily laterally along a mine face including a lfeed" operating member, and operative vconne'c-,i tionsibetween said bevel gear and said feed operating member including a pluralityfof*` transverse members, .one connected for driv-f` ing by said bevel gear-andthe'other con-jA nected to said feed operating member and one of said members extending only part Slt` way across said frame, and speed reducing Amechanism between said members.i

88. In a mining machine, a machineV frame, a horizontal motor thereon rotatable on an axis extending longitudinally of said 85, frame, cutting mechanism thereon including '4 a cutter chain driving sprocket, means for, driving said sprocket from the rear end'of y said motor. mechanism for feeding said frame bodily laterally along a mine face QQ.

including a feed operating member, and operative connections between said driving` means and said feed operating member including a pair of transverse members, one f comprising the main driving member` and 9F` connected to said driving means and the other comprising 'the main driven member and geared directly to said feed operating member, and speed reduction' mechanism between seid transverse members having intermeshing elements thereof concentric with j each of said members. Y

SSL-ln a mining machine` mach ni frame, a horizontal motor thereon rotatable on an axis extending longitudinallyiof-said .105'

frame,.cutting mechanism thereon includ# mg a cutter chain driving sprocket, means for driving said sprocket from vthe rear end of said motor, mechanism for feeding said. fra-me` bodilyy laterally along a mine face including a. feed operating member, and speed reducing connections between said driving means and said feed operating member including; a plurality of transverselnem-- l bers, and power transmitting connections therebetween operative to `provide n plurality of different definite speeds.` i

V90. In a mining machine, a machine frame, a horizontal motor thereon rotatable on an axis extending longitudinally of said .120

frame, cutting mechanism thereon includ-y ing a cutter chain driving sprocket. means for driving said sprocket from the rear end of said motor, mechanism for feeding said V frame bodily laterally along'a mine face mi including a feed ope-rating member, and op.. erativeconnections between 'said driving means `and said feed operating member in's `cluding a plurality oftransverse `mcmberS,

menace e new motor including a bevel gear, mechanism for feedin said frame bodily laterally along a mine aceyincluding a feed operating drum rotatable on a transverse axis, operative connections between said bevel gear and said drum inclu ing a plurality of transverse members atv least one of which is disposed below the plane 'of said gear, speed reduction gearing between 'said members, and drum driving gearing comprising a pinion on one `of said members and a larger meshing gear carried by said drum.

92. In a mining machine, a machine frame, a horizontal motor thereon rotatable on an axis extendinglongitudinally of said frame, cutting mechanism thereon including a cutter chain driving sprocket, means for driving said sprocket from the rear end of said motor including a bevel gear, feeding mechanism including a feed operating member rotatable on a transverse axis, operative connections between said driving means and said feedpoperating member including an upright rotatable worm below said bevel gear, a Worm gear meshing with said worm, a transverse' member carrying said worm gear, a second transverse member operatively connected to said feed operating member, and reduction mechanism between said Vtransverse members.

93. In a mining machine, a machine frame, a horizontal motor thereon rotatable on an axis extending longitudinally of said frame, cutting mechanism thereon lncluding'a cutter chain driving sprocket, means for driving said spnocket from the rear end of said motor including a bevel gear, feeding mechanism including a feed operating member rotatable on a transverse axis` operative connections 'between said driving means and said feed operating member including an upright rotatable worm, a worm gear meshing therewith, a transverse member carrying said worm gear, a second transverse member carrying a pinion directly driving said feed operating member, and reduction mechanism betweensaid transverse members having intermeshingielements thereof concentric vrith each of said members.

94.v In a mining machine, amachine frame, a horizontal lmotor thereon rotatable on an axis extending longitudinally of said frame,

" cutting mechanism thereon including a cutnasa-aaal ter chain driving sprocket, means for driving said sprocket from the rear end of said motor including a bevel gear, feeding mechanism including a feed operating member rotatable on a transverse axis, operative connections between said driving means and said feed operating member including an upright rotatable worm disposed below said 'bevel gear, a worm gear meshing therewith,

a transverse worm gear carrying shaft, an adjacent second transverse shaft operatively connected to said feed operating member, one of said shafts being a stub shaft, and speed reduction mechanism between said transverse shafts,

95. In a mining machine, a machine frame, a horizontal motor thereon rotatable on an axis extending longitudinally of said frame, cutting mechanism thereon including a cutter chain driving sprocket, means for driving the latter from the rear end of said motor including a bevel gear, feeding mechanism including a feed operating member rotatable on a transverse axis and carrying a coaxial gear on its periphery, operative connections between said bevel gear and said feed operating member including an upright rotatable worm disposed below said bevel gear, a worm gear meshing therewith, a

transverse member carrying said worm gear,

a second transverse member carrying a pinion meshing with the gear on said feed operating member, and speed reduction mechanism between said transverse members.

96. In a mining machine, a machine frame,

a horizontal motor thereon rotatable on an v axis extending longitudinally of said frame, cutting mechanism thereon including a cutter chain driving sprocket` means for driving-the latter from the rear end pf said motor including a bevel gear, feeding mechanism including a feed operating member ro tatable on a transverse axis and carrying a coaxial gear on its periphery, and operative connections between said bevel gear and said feed operating member including an upright rotatable worm, a worm gear meshing therewith, a transverse member carrying said worm gear, a second transverse member carrying a pinion meshing with the gear on said feed operating member, and driving connections between said transverse members having provision for controlling the rate of rotation of said feed operating member and including a friction-al clutch.

97. In a mining machine, a machine frame, a horizontal motor thereon rotatable on an axis extending longitudinally of said frame, cutting mechanism thereon including a cutter chain driving sprocket, means for driving the latter from the rear endof saidimotor including a bevel gear, feeding mechanism including a feed operating member rotatable on a transverse axis, and operative connections between said member and said 

